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Chronic respiratory diseases, such as chronic obstructive pulmonary disease, are a worldwide public health problem. Pulmonary rehabilitation is a gold-standard intervention for these diseases, yet attendance and completion rates are poor. Counties Manukau Health, in Auckland, New Zealand, has a high prevalence of chronic respiratory disease and a culturally diverse population, comprising large numbers of Māori and Pacific Island people, who are known to be disproportionately affected by chronic respiratory disease. The aim of this study was to investigate patient characteristics affecting engagement with the Counties Manukau Health pulmonary rehabilitation programme and identify factors predicting completion of the programme.Investigators performed a retrospective analysis using routinely collected data of 2,756 patients invited to attend the pulmonary rehabilitation programme at Counties Manukau Health. Data were analysed to compare demographic and clinical outcomes of patients who completed, did not complete or did not attend the programme, and identified factors predicting completion.Significant differences were found between groups in demographic and clinical characteristics. Increasing age, higher six-minute walk test distance at programme commencement and European ethnicity were significant predictors of completion of the PR programme.Compared to European people, Māori were 52% less likely and Pacific Island people were 40% less likely to complete the programme. These findings are significant for the Counties Manukau Health population. Further work needs to focus on determining how to make programmes more engaging to different cultures and how we can aim to reduce health inequities in these populations.